Lightning polarity over soil moisture boundaries during three tornadic outbreaks (1990-95)

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dc.contributor.advisor Arnold, David L., 1955- en_US Berry, Douglas P. en_US 2011-06-03T19:40:35Z 2011-06-03T19:40:35Z 2005 en_US 2005
dc.identifier LD2489.Z78 2005 .B47 en_US
dc.description.abstract This study presents an overview of lightning formation and the correlations seen with soil moisture slope along with potential of tornadic thunderstorms. Three moisture classes (large, marginal, small) were created using soil moisture observed during three tornado outbreaks (June-02-1990, April-26-1994, May-13-1995) over the Midwest. Chi-square, Nearest Neighbor, and Point Density calculations were performed and suggest that lightning polarity/frequency shift between soil moisture classes at a = .01. Using lightning characteristics in the thunderstorm lifecycle, one is able to evaluate relative tornadogenesis areas within moisture classes some 8-10 hours in advance. Tornadogenesis points fell within expected areas indicating that borders between marginal and small moisture classes are approximate locations of stage change (mature to dissipation) of the thunderstorm lifecycle. Results are intended to be used as a tool that helps verify situations that are more likely to be tornadic when observing real-time lightning data from thunderstorms crossing significant soil moisture boundaries.
dc.description.sponsorship Department of Geography
dc.format.extent 112 leaves : ill. (some col.), col. maps ; 28 cm. en_US
dc.source Virtual Press en_US
dc.subject.lcsh Lightning. en_US
dc.subject.lcsh Soil moisture. en_US
dc.subject.lcsh Tornadoes -- Forecasting. en_US
dc.title Lightning polarity over soil moisture boundaries during three tornadic outbreaks (1990-95) en_US Thesis (M.S.)
dc.identifier.cardcat-url en_US

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  • Master's Theses [5510]
    Master's theses submitted to the Graduate School by Ball State University master's degree candidates in partial fulfillment of degree requirements.

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